TSC87C51 TEMIC Semiconductors, TSC87C51 Datasheet - Page 16

• Manufacturer Part Number: TSC87C51
• Description: CMOS 0 to 25 MHz Programmable 8-bit Microcontroller
• Manufacturer: TEMIC Semiconductors

16
TSC87C51
AC Parameters
Explanation of the AC Symbols
Each timing symbol has 5 characters. The first character is always a “T” (stands for time). The other characters,
depending on their positions, stand for the name of a signal or the logical status of that signal. The following is a list
of all the characters and what they stand for.
Example:
T
(Load Capacitance for PORT 0, ALE and PSEN = 100pf; Load Capacitance for all other outputs = 80 pF.)
External Program Memory Characteristics
External Program Memory Read Cycle
A
= –55 C to +125 C; VSS = 0V; VCC = 5V 10%; F = 0 to 12MHz.
PORT 0
PORT 2
Symbol
TLHLL
TLLAX
TPXAV
TPXAV
TAVLL
TPLPH
TLLIV
TLLPL
TPXIX
TAVIV
TPLIV
TPXIZ
PSEN
ALE
INSTR IN
OR SFR–P2
ADDRESS
TAVLL = Time for Address Valid to ALE Low.
TLLPL = Time for ALE Low to PSEN Low.
ALE pulse width
Address Valid to ALE
Address Hold After ALE
ALE to Valid Instruction In
ALE to PSEN
PSEN Pulse Width
PSEN to Valid Instruction In
Input Instruction Hold After
PSEN
Input Instruction FloatAfter
PSEN
PSEN to Address Valid
Address to Valid Instruction
In
PSEN Low to Address Float
Parameter
TLHLL
TLLAX
TAVLL
A0–A7
TAVIV
ADDRESS A8–A15
TLLIV
TLLPL
TPLAZ
TPLIV
2TCLCL – 40
3TCLCL – 45
TCLCL – 40
TCLCL – 30
TCLCL – 30
TCLCL – 8
TPLPH
Min
INSTR IN
0
TPXIX
0 to 12 MHz
12 TCLCL
TPXIZ
4TCLCL – 100
3TCLCL – 105
5TCLCL – 105
TCLCL – 25
TPXAV
Max
A0–A7
10
ADDRESS A8–A15
Min Max
100
70
20
28
40
30
25 MHz
0
Rev. E
INSTR IN
120
140
80
35
10
–
July 03, 2000
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns